#include <stdio.h>

void dectobin( int n );

int main()
{
    int n;

    scanf("%d", &n);
    dectobin(n);

    return 0;
}

void dectobin( int n )
{
	if (n / 2 > 0) 
        dectobin (n / 2);
	printf ("%d", n % 2);
}
